*Excludes Observations that spanned multiple years

Pre 19701
19701
19710
19720
19730
19740
19750
19760
19770
19780
19791
19803
19810
19820
19830
19841
19850
19860
19870
19880
19890
19900
19910
199211
19938
19942
19951
19967
199753
19983
19990
20000
200162
20020
200327
20040
20054
20062
20070
20083
20093
201063
201131
201211
201331
201447
201526
201666
201746
201897
201980
2020151
202192
202281
202376
20244
Total1095